Description Madbull Blue “Thunder” bucking for AEG type chambers. Works well with our Alpha line of Hop-Up chambers! Recommended to use in MTW with the Alpha chamber with Regular Blue Nub and Tight tensioner ring. Only 1 bucking is in the package! Disclaimer: All aftermarket upgrade parts require necessary skill or modification to install and assemble, please consult with your airsoft technician if needed. This part is only for toys.
